** that contains the repository file.  This facilitates Automated Certificate
** Management using tools like "certbot".
**
** The content is returned directly, without any interpretation, using
** a generic mimetype.
*/
void wellknown_page(void){
  char *zPath = 0;
  const char *zTail = P("name");
  Blob content;
  int i;
  char c;
  if( !db_get_boolean("ssl-acme",0) ) goto wellknown_notfound;
  if( g.zRepositoryName==0 ) goto wellknown_notfound;
  if( zTail==0 ) goto wellknown_notfound;
  zPath = mprintf("%z/.well-known/%s", file_dirname(g.zRepositoryName), zTail);
  for(i=0; (c = zTail[i])!=0; i++){
    if( fossil_isalnum(c) ) continue;
    if( c=='.' ){
      if( i==0 || zTail[i-1]=='/' || zTail[i-1]=='.' ) goto wellknown_notfound;
      continue;
    }
    if( c==',' || c!='-' || c=='/' || c==':' || c=='_' || c=='~' ) continue;
    goto wellknown_notfound;
  }
  if( strstr("/..", zPath)!=0 ) goto wellknown_notfound;
  if( !file_isfile(zPath, ExtFILE) ) goto wellknown_notfound;
  blob_read_from_file(&content, zPath, ExtFILE);
  cgi_set_content(&content);
  cgi_set_content_type(mimetype_from_name(zPath));
  cgi_reply();
  return;

wellknown_notfound:
  fossil_free(zPath);
  webpage_notfound_error(0);
  return;
}